JP3164449B2 - Induction melting furnace cooling wall deterioration detection method - Google Patents
Induction melting furnace cooling wall deterioration detection methodInfo
- Publication number
- JP3164449B2 JP3164449B2 JP33737492A JP33737492A JP3164449B2 JP 3164449 B2 JP3164449 B2 JP 3164449B2 JP 33737492 A JP33737492 A JP 33737492A JP 33737492 A JP33737492 A JP 33737492A JP 3164449 B2 JP3164449 B2 JP 3164449B2
- Authority
- JP
- Japan
- Prior art keywords
- wall
- melting furnace
- temperature sensor
- hollow
- deterioration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Crucibles And Fluidized-Bed Furnaces (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Furnace Details (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、金属あるいはセラミッ
クスを溶融する誘導溶融炉冷却壁劣化検知方法に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting deterioration of a cooling wall of an induction melting furnace for melting metal or ceramics.
【０００２】[0002]
【従来の技術】誘導溶融炉は図５に示すように、動作コ
イル31と壁（複数の壁セグメント）32とから成るるつぼ
から構成される溶融炉である。この溶融炉の特徴は壁32
が中空であり、この中空部に水等の冷却媒体を通すこと
により、壁32の加熱による破損を防止する点にある。一
般には壁32には、熱伝導度の大きい銅が用いられてい
る。なお、金属あるいはセラミックスの溶融は上記るつ
ぼ内で行う。2. Description of the Related Art As shown in FIG. 5, an induction melting furnace is a melting furnace comprising a crucible composed of an operating coil 31 and a wall (a plurality of wall segments) 32. The feature of this melting furnace is wall 32
Is hollow, and by passing a cooling medium such as water through the hollow portion, the wall 32 is prevented from being damaged by heating. Generally, copper having high thermal conductivity is used for the wall 32. The melting of the metal or ceramic is performed in the crucible.
【０００３】このように冷却壁を用いる溶融炉では、壁
の劣化により溶融物と冷却媒体が接触し、水蒸気爆発等
の重大事故を起こすことがある。したがって、この種の
溶融炉では、壁の劣化を監視し、水等の冷却媒体の漏れ
を防止しなければならない。このために、従来は目視で
壁の劣化をチェックしていたが、壁表面には溶融物の残
滓が付着しているため十分なチェックができなかった。
この対策として、溶融物と接触する側の壁の厚さを厚く
して、その中に温度センサを埋め込み、この温度センサ
で壁の劣化による温度上昇を検知して壁の劣化を検知す
る方法がある。In a melting furnace using a cooling wall as described above, the molten material comes into contact with the cooling medium due to deterioration of the wall, and a serious accident such as a steam explosion may occur. Therefore, in this type of melting furnace, it is necessary to monitor the deterioration of the wall and prevent leakage of the cooling medium such as water. For this reason, conventionally, deterioration of the wall was checked visually, but a sufficient check could not be performed because residue of the melt adhered to the wall surface.
As a countermeasure, there is a method of increasing the thickness of the wall in contact with the molten material, embedding a temperature sensor therein, and detecting the temperature rise due to the deterioration of the wall with this temperature sensor to detect the deterioration of the wall. is there.
【０００４】[0004]
【発明が解決しようとする課題】しかし、この方法では
壁が劣化し壁に瞬時に貫通孔が生じた場合は、温度上昇
を検知しても冷却媒体の漏れを防止することはできな
い。また、溶融物と接触する側の壁の厚さを厚くする
と、壁に熱応力が発生し壁が変形あるいは破損する恐れ
がある。However, in this method, when the wall is deteriorated and a through hole is instantaneously formed in the wall, leakage of the cooling medium cannot be prevented even if the temperature rise is detected. Also, if the thickness of the wall in contact with the melt is increased, thermal stress is generated in the wall, and the wall may be deformed or damaged.
【０００５】本発明は、上記の問題点を解決するために
なされたもので、壁を二重中空構造とし、壁の内側の中
空には温度センサを配設し、外側の中空には冷却媒体を
流し、内側の中空に配設した温度センサで温度上昇を検
知することによって、壁の劣化を検知する誘導溶融炉冷
却壁劣化検知方法を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. The wall has a double hollow structure, a temperature sensor is provided in the hollow inside the wall, and a cooling medium is provided in the hollow outside. It is an object of the present invention to provide a method for detecting deterioration of a cooling wall of an induction melting furnace, which detects deterioration of a wall by detecting a rise in temperature by a temperature sensor disposed in an inner hollow space.
【０００６】[0006]
【課題を解決するための手段】本発明の要旨は、冷却媒
体により壁を冷却する誘導溶融炉において、壁を二重中
空構造とし、壁の内側の中空に熱および電気の良導体充
填物とともに温度センサを配設し、この温度センサで温
度上昇を検知して壁の劣化を検知する誘導溶融炉冷却壁
劣化検知方法である。SUMMARY OF THE INVENTION The gist of the present invention is to provide an induction melting furnace in which a wall is cooled by a cooling medium, wherein the wall has a double-hollow structure, and the inside of the wall is filled with heat and electric good conductor filling together with temperature. This is a method for detecting deterioration of a cooling wall of an induction melting furnace in which a sensor is provided and the temperature sensor detects a rise in temperature to detect deterioration of the wall.
【０００７】[0007]
【作用】壁の劣化は亀裂と摩耗によるものであるが、こ
れらが時間の経過とともに大きくなり、壁に貫通孔が生
じることになる。本発明では、壁が劣化して溶融物と接
触する壁に貫通孔が生じても、壁を二重中空構造として
いるため、溶融物は冷却媒体と接触することはなく、水
蒸気爆発等を起こすことはない。The deterioration of the wall is due to cracks and abrasion, which increase with the passage of time, and a through hole is formed in the wall. In the present invention, even if the wall deteriorates and a through hole is formed in the wall that comes into contact with the molten material, the molten material does not come into contact with the cooling medium and causes a steam explosion or the like because the wall has a double hollow structure. Never.
【０００８】溶融物と接触する壁に貫通孔が生じ、貫通
孔から進入した溶融物が充填物中を移動し温度センサに
達すると、ここで温度センサは温度上昇を検知して壁の
劣化を検知することができる。溶融物の移動は二重中空
構造の中間壁で阻止されるので、壁劣化検知後、安全に
炉を停止することができる。[0008] A through hole is formed in the wall in contact with the melt, and when the melt entering from the through hole moves through the packing and reaches the temperature sensor, the temperature sensor detects a rise in temperature and deteriorates the wall. Can be detected. Since the movement of the melt is stopped at the intermediate wall of the double hollow structure, the furnace can be safely shut down after detecting the deterioration of the wall.
【０００９】また、二重中空構造の中間壁に貫通孔が生
じ、冷却媒体が温度センサ側に進入したときは、温度セ
ンサは冷却媒体の移動による温度低下を検知して壁の劣
化を検知することができる。この場合も、壁劣化検知
後、安全に炉を停止することができる。When a through hole is formed in the intermediate wall of the double hollow structure and the cooling medium enters the temperature sensor side, the temperature sensor detects a temperature decrease due to the movement of the cooling medium and detects deterioration of the wall. be able to. Also in this case, the furnace can be safely stopped after the wall deterioration is detected.
【００１０】充填物は熱の良導体であるため、通常時は
十分な冷却効果を発揮し、また、電気の良導体であるた
め、誘導電流による熱損失も小さい。Since the filler is a good conductor of heat, it exhibits a sufficient cooling effect in normal times, and since it is a good conductor of electricity, heat loss due to induced current is small.
【００１１】[0011]
【実施例】本発明の実施例を以下に説明する。図１は本
発明の概念図で、１は二重中空壁で、二重中空壁１の内
側の中空２には温度センサ３が充填物４とともに配設さ
れている。二重中空壁１の外側の中空５には冷却水６を
通して、二重中空壁１を冷却している。温度センサ３の
端部は温度電気信号を検知するために、検知器（図示せ
ず）に接続されている。図中12は溶融物で、31は動作コ
イルである。Embodiments of the present invention will be described below. FIG. 1 is a conceptual diagram of the present invention, wherein 1 is a double hollow wall, and a temperature sensor 3 is disposed together with a filler 4 in a hollow 2 inside the double hollow wall 1. Cooling water 6 passes through the hollow 5 outside the double hollow wall 1 to cool the double hollow wall 1. The end of the temperature sensor 3 is connected to a detector (not shown) for detecting a temperature electric signal. In the figure, reference numeral 12 denotes a melt, and reference numeral 31 denotes a working coil.
【００１２】実施例１ 図２は充填物に粉末充填物７を使用した例で、粉末充填
物７には銅粉末を用いた。粉末充填物７を充填した後、
粉末充填物間の空間を大気あるいはヘリウム充填してい
る。溶融物12と接触する壁に貫通孔が生じ溶融物が進入
してくると、冷却されている粉末充填物７と接触し、瞬
間固形化して進入は停止するが、炉が誘導炉であるの
で、ふたたび溶融して充填物間の空間を移動する。溶融
物が充填物間の空間を移動し温度センサ３に達すると、
ここで温度センサ３は温度上昇を検知して、温度信号を
検知器に送り、検知器で壁に貫通孔が生じたことを知る
ことができる。壁に貫通孔が生じたことを検知した後、
安全に炉を停止する。Example 1 FIG. 2 shows an example in which a powder filler 7 is used as the filler. Copper powder is used as the powder filler 7. After filling the powder filling 7,
The space between the powder packings is filled with air or helium. When a through hole is formed in the wall in contact with the melt 12 and the melt enters, it comes into contact with the cooled powder filling 7 and solidifies instantaneously and stops. However, since the furnace is an induction furnace, Melt again and move through the space between the packings. When the melt moves through the space between the packings and reaches the temperature sensor 3,
Here, the temperature sensor 3 detects the temperature rise, sends a temperature signal to the detector, and can detect that a through hole has been formed in the wall by the detector. After detecting that a through hole has occurred in the wall,
Shut down the furnace safely.
【００１３】粉末充填物７の銅粉末は熱の良導体で、銅
粉末間の空間が大気あるいはヘリウムであるので、内側
の中空２内は、通常時は熱伝導性がよく、十分な冷却性
能を有している。また、銅粉末間は電気の良導体である
ので、銅粉末間を流れる誘導電流による熱損失も小さ
い。Since the copper powder of the powder filling 7 is a good conductor of heat and the space between the copper powders is air or helium, the inside of the hollow 2 usually has good thermal conductivity and sufficient cooling performance. Have. In addition, since the space between the copper powders is a good conductor of electricity, heat loss due to an induced current flowing between the copper powders is small.
【００１４】実施例２ 図３は充填物に低融点金属充填物８を使用した例で、低
融点金属充填物８にはNaを用いた。溶融物12と接触する
壁に貫通孔が生じ溶融物が進入してくると、冷却されて
いる低融点金属充填物８と接触し、瞬間固形化して進入
は停止するが、炉が誘導炉であるので、ふたたび溶融し
て低融点金属充填物８を加熱、溶融して、低融点金属充
填物８と混ざり合う。この溶融物と低融点金属充填物８
の混ざったものが温度センサ３に達すると、ここで温度
センサ３は温度上昇を検知して、温度信号を検知器に送
り、検知器で壁に貫通孔が生じたことを知ることができ
る。壁に貫通孔が生じたことを検知した後、安全に炉を
停止する。Embodiment 2 FIG. 3 shows an example in which a low melting point metal filling 8 is used as the filling. Na is used for the low melting point metal filling 8. When a through-hole is formed in the wall in contact with the melt 12 and the melt enters, the melt contacts the cooled low-melting metal filling 8 and solidifies instantaneously and stops, but the furnace is operated in an induction furnace. Therefore, the low melting point metal filling 8 is melted again, heated and melted, and mixed with the low melting point metal filling 8. This melt and the low melting metal filler 8
When the mixture reaches the temperature sensor 3, the temperature sensor 3 detects the temperature rise, sends a temperature signal to the detector, and can know that a through hole has been formed in the wall by the detector. After detecting the formation of a through hole in the wall, shut down the furnace safely.
【００１５】低融点金属充填物８は密度の高いNa金属で
あるので、内側の中空２内は、通常時は熱伝導性がよ
く、十分な冷却性能を有している。なお、低融点金属充
填物には、Na以外にK 等を使用することも可能である。
また、温度センサに替えて熱電対を使用しても、本発明
の目的を達成することができる。Since the low melting point metal filler 8 is a high density Na metal, the inside of the hollow 2 usually has good thermal conductivity and sufficient cooling performance. In addition, it is also possible to use K and the like in addition to Na for the low melting metal filling.
Further, the object of the present invention can be achieved by using a thermocouple instead of the temperature sensor.
【００１６】変形実施例 図３は二重中空壁１を二分割構造にし着脱可能にしたも
ので、溶融物12と接触する内側の壁９を水冷中空壁10に
ボルト11で固定している。このように、二重中空壁を二
分割構造にすることによって、温度センサ３の交換、充
填物４の交換が容易となり、さらに内側の壁９と水冷中
空壁10の目視チェックも可能になる。Modified Embodiment FIG. 3 shows a double hollow wall 1 having a two-part structure and being detachable, in which an inner wall 9 which comes into contact with a melt 12 is fixed to a water-cooled hollow wall 10 with bolts 11. In this way, by forming the double hollow wall into a two-part structure, the replacement of the temperature sensor 3 and the replacement of the filler 4 are facilitated, and the inner wall 9 and the water-cooled hollow wall 10 can be visually checked.
【００１７】以上のように、二重中空構造の壁の内側の
中空に配設した温度センサで温度上昇を検知することに
よって、壁の劣化を検知し、安全に炉を停止することが
できる。As described above, the deterioration of the wall can be detected by detecting the temperature rise by the temperature sensor disposed in the hollow inside the double hollow structure wall, and the furnace can be stopped safely.
【００１８】[0018]
【発明の効果】本発明は、冷却媒体により壁を冷却する
誘導溶融炉において、壁を二重中空構造とし、壁の内側
の中空に熱および電気の良導体充填物とともに温度セン
サを配設し、この温度センサで温度上昇を検知して壁の
劣化を検知する誘導溶融炉冷却壁劣化検知方法であっ
て、本発明によれば壁の劣化により冷却媒体が漏れ出す
まえに、壁の劣化を検知し、安全に炉を停止することが
できる。According to the present invention, in an induction melting furnace for cooling a wall with a cooling medium, the wall has a double hollow structure, and a temperature sensor is provided in the hollow inside the wall together with a good heat and electric conductor filling. This is a method for detecting deterioration of a cooling wall of an induction melting furnace in which a temperature rise is detected by the temperature sensor to detect deterioration of the wall. According to the present invention, deterioration of the wall is detected before the cooling medium leaks due to deterioration of the wall. And safely shut down the furnace.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明の概念図である。FIG. 1 is a conceptual diagram of the present invention.
【図２】本発明の実施例１の説明図である。FIG. 2 is an explanatory diagram of Embodiment 1 of the present invention.
【図３】本発明の実施例２の説明図である。FIG. 3 is an explanatory diagram of a second embodiment of the present invention.
【図４】本発明の変形実施例の説明図である。FIG. 4 is an explanatory view of a modified embodiment of the present invention.
【図５】誘導溶融炉の説明図である。FIG. 5 is an explanatory view of an induction melting furnace.
１…二重中空壁、２…内側の中空、３…温度センサ、４
…充填物、５…外側の中空、６…冷却水、７…粉末充填
物、８…低融点金属充填物、９…内側の壁、10…水冷中
空壁、11…ボルト、12…溶融物、31…動作コイル、32…
壁。1 ... double hollow wall, 2 ... inner hollow, 3 ... temperature sensor, 4
... filling, 5 ... outer hollow, 6 ... cooling water, 7 ... powder filling, 8 ... low melting point metal filling, 9 ... inner wall, 10 ... water cooled hollow wall, 11 ... bolt, 12 ... melt, 31 ... working coil, 32 ...
wall.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｆ２７Ｄ 11/06 Ｆ２７Ｄ 11/06 Ａ (58)調査した分野(Int.Cl.7，ＤＢ名) F27D 1/00 F27B 14/06 F27B 14/20 F27D 1/12 F27D 11/06 H05B 6/24 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 identification code FI F27D 11/06 F27D 11/06 A (58) Field surveyed (Int.Cl. 7 , DB name) F27D 1/00 F27B 14 / 06 F27B 14/20 F27D 1/12 F27D 11/06 H05B 6/24
Claims (1)
において、壁を二重中空構造とし、壁の内側の中空に熱
および電気の良導体充填物とともに温度センサを配設
し、この温度センサで温度上昇を検知して壁の劣化を検
知することを特徴とする誘導溶融炉冷却壁劣化検知方
法。1. An induction melting furnace for cooling a wall with a cooling medium, wherein the wall has a double hollow structure, and a temperature sensor is disposed in the hollow inside the wall together with a good heat and electric conductor filler. A method for detecting deterioration of a cooling wall of an induction melting furnace, comprising detecting a temperature rise and detecting deterioration of the wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33737492A JP3164449B2 (en) | 1992-12-17 | 1992-12-17 | Induction melting furnace cooling wall deterioration detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33737492A JP3164449B2 (en) | 1992-12-17 | 1992-12-17 | Induction melting furnace cooling wall deterioration detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06185870A JPH06185870A (en) | 1994-07-08 |
| JP3164449B2 true JP3164449B2 (en) | 2001-05-08 |
Family
ID=18308025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33737492A Expired - Lifetime JP3164449B2 (en) | 1992-12-17 | 1992-12-17 | Induction melting furnace cooling wall deterioration detection method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3164449B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4496623B2 (en) * | 2000-08-18 | 2010-07-07 | シンフォニアテクノロジー株式会社 | Induction heating melting furnace |
| DE102005013924B4 (en) * | 2005-03-26 | 2007-12-27 | Saveway Gmbh & Co. Kg | Wall panel for melting furnaces |
| JP6192536B2 (en) * | 2010-05-25 | 2017-09-06 | インダクトサーム・コーポレイションＩｎｄｕｃｔｏｔｈｅｒｍ Ｃｏｒｐｏｒａｔｉｏｎ | Gas seal induction tunnel furnace |
-
1992
- 1992-12-17 JP JP33737492A patent/JP3164449B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06185870A (en) | 1994-07-08 |
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